摘要
以环氧氯丙烷、叔胺、甘油为主要原料,水为溶剂,经过开环、季铵化反应,合成了新型三联季铵盐阳离子表面活性剂(Ⅲ-12-4),得率为86.9%。采用质谱和元素分析测试技术对产物结构进行表征,证明所得产物即为目标产物。通过采用DCA-315型表面张力及动态接触角分析仪对表面张力的测定研究了其与十二烷基硫酸钠(SDS)复配体系的表面化学性质,稳态荧光探针法考察了微极性变化,还得到了胶束聚集数。结果表明,复配体系与单一体系相比,具有更低的临界胶束浓度(cmc)和降低表面张力的效能,表现出协同效应。当n(Ⅲ-12-4)∶n(SDS)=3∶7时,复配体系的临界表面张力(γcmc)和临界胶束浓度分别为16.95mN/m和1.33×10-5mol/L,并且胶束聚集数只有SDS的1/6,混合胶束结构紧密,微极性降低。
A trimericationic surfactant （Ⅲ-12-4） was prepared by ring-opening and quaternization reactions from epichlorohydrin, tertiary amine and glycerin with water as the solvent. The yield of Ⅲ-12-4 was 86. 9%. The surfactant was characterized by MS and elemental analysis. The surface properties of Ⅲ-12-4 and sodium dodecyl sulphate（SDS） mixing systerm were determined by means of surface tension measurement using DSC apparatus. The development of micropolarity and the micelle aggregation number（Nm ） of Ⅲ-12-4/SDS were assesed by steady fluorescence prob method. The results indicated that compared with monosurfactant system, the mixing systerm exhibited lower critical micelle concentration （cmc） and more effective surface tension reduction, showing synergistic effect. When n （ Ⅲ-12-4 ）： n （ SDS ） = 3： 7, the critical surface tension （ γcmc ） and critical micelle concentration（cmc） were 16. 95 mN/m, 1.33 × 10^-5 mol/L respectively, and the micelle aggregation number was 1/6 of that of SDS. The mixing micelle was more compact. Micropolarity was lower.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第10期1211-1215,共5页
Chinese Journal of Applied Chemistry
作者简介
通讯联系人：许虎君，男，博士，副教授；E—mail：xu6209@163．com；研究方向：表面活性剂的合成与应用
